Mixer



F- B. TOTMAN MIXER Feb. 16, 1932';

Filed 'June 11,. 1929 2 Sheets-Sheet l INVEN'TOR. FRANK 5. 7'0 TMA/V BY fix @Qaww ATTORNEY Feb. 16, 1932. F. B.-TC')TMAN MIXER Filed June 11, 1929 2 Sheets-Sheet 2 INVENTOR. FRA/v/r B 7"o7wA/v Y @pwnwu ATTORNEY Patented Feb. 16,1932

UNITED FRANK B. TOTMAN, or 'Amnnnmi, cnmito mm, AssIenoR 'ro GEORGE J. K HRTSLJR...

, or nosilmennnscenironnm;

provide a mixer whereby the charges or MIXER Application filed June 11,

My present invention relates to mixers, sometimes known as pug mills, particularly for mixing plastic materials, such as asphalt, and the like. a p

The objects of this invention are: first, to

batches ofmaterials mixed thereinflmayfbe easily, quickly and completely discharged by easily controlled; fourth, to provide a mixer of this class in which the mixer'receptacleis normally held in an upright position by a brake mechanism, and in which the brake mechanism is released simultaneously by unitarymeans with the application of the power to the mechanism for rotating the receptacle for dumping or discharging thesame, and also one in which the brakes are appliedwhen the power for rotatingthe receptacle is dis- I p v mixing receptacle and remain underneath the receptacle until the same are charged with connected; fifth, to provide a mixer of this class in which the paddles or agitators are operated at substantially normal speed dur ng the dumping or discharging operation; sixth, to provide a dumping or'discharging mechanism for mixers of this class,which mechanism may be 'easilycontrolled so that the mixing receptacle, when rotated, may be stopped at any position desired; and, seventh, to provide a novelly'constructed machine of this class, and one which isrelatively simple and economical ofzconstruction, efficient, durable and which will not readily de teriorate or get outfof order.

With these and other 010 mm m vi was will appear hereinafter, my invention consistsof certain novel featuresof construction, combination and arrangeinent-ofparts portions aswill be hereinafter described n. de-. tail and particularly' iset forth the ap- 1929. Seria1 'No. 370,090.

pended claims, reference being hadto the accompanying drawings and to the characters of reference thereon which form apart of this application in which: j

Figure 1 is a plan view of my mixer in its preferred form'flof construction; Fig. 2 is. a

.sideelevational view thereof; Fig' 3 is. a frags ncntary sectional view thereof taken through 33 of Fig. 1; Fig. f is a sectional, end elevational iew thereoftakenat it-A of Fig- 1; Fig. .5 is a fragmentary sectional view thereof taken through 55 of Fig. 1 and, Fig. 6 is a sectional view thereof taken at 6 -45 of Like characters of;reference refer to similarpart'sandportions throughout the views of the drawings. I V

The present embodiment of my invention, as illustrated in the drawings, isin a stationary mixingplant, but it will be understood thatgmy mixer is not limited to such use, ,As shown inthe drawings,themixingreceptacle of my machine is supported at its opposite end'on pedestals orjournalsl and 2 which 'aremo-unted on the upper'ends ofsuitable foundatiQnsSand 4= which are positioned at theopposite sides of andcontiguous to a runway onorthrough which trucks or other conveyances may pass. These trucks orgother conveyances may pass immediately under the thedesired loads. v l p The mixing receptacle, designated .11, is here shown as divided intothree. compartments', namely, the mixingcompartment 11a and two gear compartments llb andllcat the opposite ends thereof. To the outer sides of the endheads 11d and 116 which form theouter wallsof the gear compartments 11b and respectively of the-receptacle, are provided large trunnions 12 and 13, the axes i of which extend approximately through the center ,of gravity of the receptacle. These trunnions are rotatably mounted in the .jou 'nalsland2; r a, Q

Extending longitudinally through .the' mixing. compartment of the receptacle. 11 are apair. of mixing paddle supporting shafts .21 3 -I1d22. These shafts are positioned'parend of the shaft 22, thus driving the shafts 21 and 22 and the paddlesthereon in opposite directions.

The drive shaft 14 is coaxial with the trunnion 12 and is rotatable therein. This shaft extends a considerable distance-beyond the end of the trunnion 12 and is journaled at its outer end on a journal 15. At the latter end of the drive shaft 14 is mounted a drive gear 16 which is-driven by a drive pinion'17 'mounted on the motor 18.

On the drive shaft 14 is mounted a small shaft of the electric pulley 31 which is connected by a belt 32 to a large pulley 33. This pulley 33 is rotatably' mounted on a'counter shaft 34 which is positioned parallel to the drive shaft at one side thereof. To one side'of the pulley is secured. a clutch'member 35- which is here shown as an internalcone clutch member. On the shaft 34 is keyed but slidably mounted a cone clutchmem'ber 36 which is adapted to be shifted into engagement with the clutch member 35 for rotating the counter shaft. On the counter-shaft, at the side of the pulleyp33 opposite the clutch, is mounted and keyed a small sprocket 37 which is connected by a link belt or chain 38 to a large sprocket wheel 39 which is mounted on the end of the trunnion 12 which extends through the journal 1. This'sprocket -39, when-rotated, is adapted torotate the mixing receptacle for dumping or discharging the contents therefrom.

The cone clutch member 36is adapted to V be shifted into and out of engagement with and from the clutch member 35 by a clutch lever 41' which is pivotally mounted at its lower end on abracket 42 which may be supported on the foundation '3. The clutch member '36 is normally held 'in disengaged relation from the clutch member 35 by a spring 43 which is attached-to the upper end of the clutch lever. The clutch is controlled by a control lever'44 which is secured at its lower end to a rockshaft 45 which is 'rotatably mounted on a framework 46. This framework supports an operators platform 47 throughand above which the uppergend of the control lever 44 extends. The control lever is held in a receded or backwardposition by a dog 48 whichengages a notched v I ters Patent is: L 1 quadrant 49 mounted 'on the platform 47. 1. In a'machine of theclass described, a'ro- To the control lever 44 is attached a cable 50, the attachment being between the pivotal axis of the control lever and the platform 47 This cable extends around a sheave 51 causing the mixing receptacle to berotated;

On the end of the trunnion 12 which ex- 7 tends beyond the journal 1, is also mounted a brake drum 61 around which extends a brake band 62. One end of the brake drum is fixed to a bracket 63 which may be mounted on the foundation 3. On the upper end of the bracket 63 is pivotally mounted a. rocker arm 64. To the end of the rockerarm extending to ward the brake drum is pivotally. connected the other end of thebrakexband, 'as shown best in Fig. 4. The rear end of the. rocker arm' 64 is pivotally connected by a link 65 to the end of a brake arm66 which is secured to the rockshaft 45. Thus whenthe control lever 44 is forced forwardly, causing the clutch to beengaged, the brake bandis released, and when thecontrol lever 44 is forced backwardly, the brake is applied andthe clutch is disengaged.

. Theoperation of my mixer is briefly as follows I I The mixer is started with the control lever 44 in-its backward position, as shown in Fig. 4. The mixing compartmentv is then charged with the materials to be mixed, The mixing operation is continued. until the .materials aremixed .to the desired degree. A truck or other conveyance is placed directly below the mixing receptacle. The control lever 44 is then shifted forwardly which operation releases the brake' and shifts the clutch mem; hers into engagement for permitting the mixing receptacle to be rotated about its axis, while the agitators continue to rotate at substantially the normal speed with respect to the receptacle. If desired, the receptacle may be held in a position with its open side downwardly,.or the rotation of the receptacle may be continuous until it is again right side up. The lever 44 is then drawn backwardly which holds the mixing receptacle in its normal upright position for receiving the charge.

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wislrto be limited tothis particular construction, combination and arrangement, but desire .to' include in the scope of my invention the construction, combination and arrangement substantially as set forth in the appended'claims; Y V l Having thus;described my invention, what I claim as new and desire to secure byLLettatable receptacle, agitators mounted therein, means for rotating the agitators, speed reduction means connecting said last mentioned means to said receptacle for rotating the same by saidfirst means, and brake means in connection with the receptacle for checking the rotation thereof.

2. In a machine of ,the class described, a rotatable receptacle, agitators mounted therein, means for rotating the agitators, speed.

reduction means connecting said last mentioned meansto said receptacle for rotating the same by said first means, brake means in connection with the receptacle for checking the rotation thereof, and unitary means for controlling said speed reduction means and said brake means.

3. In a machine of the class described, a rotatable receptacle, agitators mounted therein, means for rotating the agitators, speed reduction transmission means adapted to connect said first mentioned means to said receptacle,

a clutch for connecting said transmission means to said first mentioned means and said receptacle, and means for checking the rotation of the receptacle. i

4. In a machine of the class described, a rotatable receptacle, agitators mounted there in, means for rotating the agitators, speed reduction transmission means adapted to con.- nect said first mentioned means tosaid receptacle, a clutch for connecting said transmission means to said first mentioned means and first shaft to the clutch, other transmission means connecting said countershaft to the receptacle, and means for controlling said clutch.

6. In a machine of the class described, a rotatable receptacle, agitators mounted therein and movable therewith and relative thereto when said receptacle is stationary and when rotated, a unitary shaft coaxial with the axis of rotation of the receptacle, a countershaft,

a clutch on the countershaft, speed reduction transmission means connecting the first shaft to the clutch, other transmission meansconnecting said countershaft to the receptacle,

means for checking the rotation of the receptrunnions at its opposite sides and rotatably tacle, and unitary means for controllin the clutch and the checking means. i

7. In a machine of the class described, a pair of journals, a receptacle provided with 'mounted with said trunnions in said journals, agitators in said receptacle, a shaft extending through one. of said trunnions for driving the agitators, means in connection 7 with the trunnions for checking the rotation of the receptacle, reduction power transmission means connecting said shaft to said trunnion, and unitary means forccontrolling said transmission means and said checking means.

8. In a machine of the class described, a rotatable receptacle, a drive shaft coaxial with the axis of rotation of the receptacle and extending thereinto, agitators in said receptacle connected to said shaft, speed reduction means, a clutch in association with said speed reduction means and adapted to connect said drive" shaft and said receptacle through said speed reduction means, and means for actuating the clutch.

9. In a machine of the class described, a rotatable receptacle, agitators mounted therein, means for operating the agitators, a-clutch adapted to connectsaid first mentioned means to said receptacle for rotating the same, means for checking the rotation of the receptacle, and unitary means for controlling the clutch and the checking means.

10. In a machine of the class described, a support, a receptacle mounted on the support and adapted to turn thereon on an axis, agitators mounted in the receptacle, means for rotating the agitators, means for connecting the last mentioned means to said receptacle 7 for turning the same about its axis, brake means in connection with the receptacle for checking the movement thereof, and unitary means for controlling and simultaneously actuating said operative connecting means and said brake means.

11. In a machine of the class described, a rotatable receptacle, agitators mounted therein, means coaxial with the axis of rotation of the receptacle for rotating the agitators,

.-means adapted for periodic connection with the receptacle for periodically and completely rotating the same in the same direction as the last mentioned means but at a slower ing means is disconnected.

In testimony whereof, I have hereunto set my hand at Los Angeles', California this 22nd day of May 1929.

-. FRANK B. T'OTMAN. 

